'Busy' method of 'IUWebBrowser2' object failed

When I launch the site via my code, there is an error of type "method document of object iwebbrowser2 failed " at the level of my variable "oDoc"

Private Function CreerNavigateur(ByVal mails As String)
Dim IE As Object
Dim oDoc As Object
Dim Htable, maTable As Object
Dim text As String
Set IE = CreateObject("InternetExplorer.Application")
IE.Visible = False
IE.navigate "https://csrtool-ssl.sso.infra.ftgroup/csrtool_web/Bricks/pg/osuit/pages/identity/IdentityAccountAndUsers?type=emailAlias&value=" & mails & "&tab_main=AccountInfo"
While IE.Busy Or IE.ReadyState <> READYSTATE_COMPLETE: DoEvents: Wend
    Set oDoc = IE.Document
    Set Htable = oDoc.getElementsByTagName("div")(1)
   ' MsgBox Htable.innerhtml
    Set maTable = Htable.getElementsByTagName("span")
    'MsgBox maTable(0).href
    'myData = maTable(0).innertext
    'MsgBox (myData)
    IE.Quit
    'On libère les variables
    Set IE = Nothing
    Set oDoc = Nothing
End Function

thank you for helping me to see my mistake